In order to work faster and improve your productivity, here is a compiled list of many shortcuts available in Word 2010.
Key Behavior
CTRL+SHIFT+A Converts the selected text to capital letters or vice versa
CTRL+SHIFT+F Displays the Font dialog box.
CTRL+SHIFT+G Displays the Word Count dialog box.
CTRL+SHIFT+S Displays the Apply Styles task pane.
ALT+R Displays the Review tab
ALT+CTRL+1 Apply Heading 1, Similarly ALT + CTRL + 2 will apply heading 2
CTRL+SHIFT+L Applies Bullets
CTRL+SHIFT+F5 Bookmark
CTRL + B Bold Text
CTRL + I Italic Text
CTRL + U Underline Text
CTRL+PAGE DOWN Browse Next
CTRL+E Navigate to the center Paragraph
CTRL+SHIFT+ENTER Column Break
CTRL+SHIFT+C Copy Format
ALT+SHIFT+F7 Dictionary
ALT+CTRL+S Splits the Document
CTRL+SHIFT+D Double Underline
CTRL+END End of Document
END End of line
CTRL+SHIFT+P Font size select
SHIFT+F5 Go Back to previous state
ALT+CTRL+Z Go Back to previous state
CTRL+SHIFT+. Grow Font
CTRL+] Grow Font one point
ALT+SHIFT+R Header Footer Link
CTRL+K Hyperlink
CTRL+M Indentation
CTRL+J Justifies Paragraph
ALT+F8 Inserts Macros
ALT+SHIFT+K Mail Merge Check
F10 Menu Mode
ALT+F7 Moves to the Next Misspelling
CTRL+H Replace
CTRL+P Print
CTRL+SHIFT+F12 Also launches Print
F12 Save As
CTRL+SHIFT+K Small Caps
CTRL+SHIFT+S Style
SHIFT+F7 Thesaurus
ALT+SHIFT+T Time Field
CTRL+SHIFT+M Unindent
via addictivetips